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1 # Generate a flat list of symbols to export.
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2 # Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
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3 # Contributed by Richard Henderson <rth@cygnus.com>
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4 #
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5 # This file is part of GCC.
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6 #
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7 # GCC is free software; you can redistribute it and/or modify it under
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8 # the terms of the GNU General Public License as published by the Free
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9 # Software Foundation; either version 3, or (at your option) any later
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10 # version.
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11 #
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12 # GCC is distributed in the hope that it will be useful, but WITHOUT
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13 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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14 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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15 # License for more details.
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16 #
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17 # You should have received a copy of the GNU General Public License
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18 # along with GCC; see the file COPYING3. If not see
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19 # <http://www.gnu.org/licenses/>.
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20
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21 # Options:
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22 # "-v leading_underscore=1" : Symbols in map need leading underscore.
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23 # "-v pe_dll=1" : Create .DEF file for Windows PECOFF
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24 # DLL link instead of map file.
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25
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26 BEGIN {
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27 state = "nm";
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28 excluding = 0;
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29 if (leading_underscore)
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30 prefix = "_";
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31 else
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32 prefix = "";
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33 }
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34
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35 # Remove comment and blank lines.
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36 /^ *#/ || /^ *$/ {
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37 next;
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38 }
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39
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40 # We begin with nm input. Collect the set of symbols that are present
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41 # so that we can elide undefined symbols.
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42
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43 state == "nm" && /^%%/ {
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44 state = "ver";
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45 next;
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46 }
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47
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48 state == "nm" && ($1 == "U" || $2 == "U") {
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49 next;
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50 }
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51
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52 state == "nm" && NF == 3 {
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53 def[$3] = 1;
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54 next;
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55 }
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56
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57 state == "nm" {
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58 next;
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59 }
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60
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61 # Now we process a simplified variant of the Solaris symbol version
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62 # script. We have one symbol per line, no semicolons, simple markers
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63 # for beginning and ending each section, and %inherit markers for
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64 # describing version inheritance. A symbol may appear in more than
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65 # one symbol version, and the last seen takes effect.
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66 # The magic version name '%exclude' causes all the symbols given that
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67 # version to be dropped from the output (unless a later version overrides).
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68
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69 NF == 3 && $1 == "%inherit" {
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70 next;
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71 }
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72
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73 NF == 2 && $2 == "{" {
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74 if ($1 == "%exclude")
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75 excluding = 1;
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76 next;
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77 }
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78
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79 $1 == "}" {
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80 excluding = 0;
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81 next;
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82 }
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83
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84 {
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85 sym = prefix $1;
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86 if (excluding)
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87 delete export[sym];
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88 else
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89 export[sym] = 1;
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90 next;
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91 }
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92
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93 END {
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94
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95 if (pe_dll) {
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96 print "LIBRARY " pe_dll;
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97 print "EXPORTS";
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98 }
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99
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100 for (sym in export)
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101 if (def[sym] || (pe_dll && def["_" sym]))
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102 print sym;
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103 }
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